<template name="w-picker">
	<view class="w-picker" :key="createKey" :data-key="createKey">
		<view class="mask" :class="{'visible':visible}" @tap="onCancel" @touchmove.stop.prevent catchtouchmove="true">
		</view>
		<view class="w-picker-cnt" :class="{'visible':visible}">
			<view class="w-picker-header" @touchmove.stop.prevent catchtouchmove="true">
				<text @tap.stop.prevent="onCancel">取消</text>
				<slot></slot>
				<text :style="{'color':themeColor}" @tap.stop.prevent="pickerConfirm">确定</text>
			</view>
			<region-picker v-if="mode=='region'" class="w-picker-wrapper" :value="value" :hide-area="hideArea"
				:default-type="defaultType" :item-height="itemHeight" @change="handlerChange" @touchstart="touchStart"
				@touchend="touchEnd">
			</region-picker>
		</view>
	</view>
</template>

<script>
	import regionPicker from "./region-picker.vue"

	export default {
		name: "w-picker",
		components: {
			regionPicker,
		},
		props: {
			mode: {
				type: String,
				default: "date"
			},
			value: { //默认值
				type: [String, Array, Number],
				default: ""
			},
			current: { //是否默认显示当前时间，如果是，传的默认值将失效
				type: Boolean,
				default: false
			},
			themeColor: { //确认按钮主题颜色
				type: String,
				default: "#f5a200"
			},
			fields: { //日期颗粒度:year、month、day、hour、minute、second
				type: String,
				default: "date"
			},
			disabledAfter: { //是否禁用当前之后的日期
				type: Boolean,
				default: false
			},
			second: { //time-picker是否显示秒
				type: Boolean,
				default: true
			},
			options: { //selector,region数据源
				type: [Array, Object],
				default () {
					return []
				}
			},
			defaultProps: { //selector,linkagle字段转换配置
				type: Object,
				default () {
					return {
						label: "label",
						value: "value",
						children: "children"
					}
				}
			},
			defaultType: {
				type: String,
				default: "label"
			},
			hideArea: { //mode=region时，是否隐藏区县列
				type: Boolean,
				default: false
			},
			level: {
				//多级联动层级，表示几级联动,区间2-4;
				type: [Number, String],
				default: 2
			},
			timeout: { //是否开启点击延迟,当快速滚动 还没有滚动完毕点击关闭时得到的值是不准确的
				type: Boolean,
				default: false
			},
			expand: { //mode=shortterm 默认往后拓展天数
				type: [Number, String],
				default: 30
			},
			startYear: {
				type: [String, Number],
				default: 1970
			},
			endYear: {
				type: [String, Number],
				default: new Date().getFullYear()
			},
			visible: {
				type: Boolean,
				default: false
			}
		},
		created() {

			this.createKey = Math.random() * 1000;
		},
		data() {
			return {
				itemHeight: `height: ${uni.upx2px(88)}px;`,
				result: {},
				confirmFlag: true
			};
		},
		methods: {
			touchStart() {
				if (this.timeout) {
					this.confirmFlag = false;
				}
			},
			touchEnd() {
				if (this.timeout) {
					setTimeout(() => {
						this.confirmFlag = true;
					}, 500)
				}
			},
			handlerChange(res) {
				let _this = this;
				this.result = {
					...res
				};
			},
			show() {
				this.$emit("updateVisible", true);
			},
			hide() {
				this.$emit("updateVisible", false);
			},
			onCancel(res) {
				this.$emit("updateVisible", false);
				this.$emit("cancel");
			},
			pickerConfirm() {
				if (!this.confirmFlag) {
					return;
				};
				this.$emit("confirm", this.result);
				this.$emit("updateVisible", false);
			}
		}
	}
</script>

<style lang="scss">
	.w-picker-item {
		text-align: center;
		width: 100%;
		height: 88upx;
		line-height: 88upx;
		text-overflow: ellipsis;
		white-space: nowrap;
		font-size: 30upx;
	}

	.w-picker {
		z-index: 888;

		.mask {
			position: fixed;
			z-index: 1000;
			top: 0;
			right: 0;
			left: 0;
			bottom: 0;
			background: rgba(0, 0, 0, 0.6);
			visibility: hidden;
			opacity: 0;
			transition: all 0.3s ease;
		}

		.mask.visible {
			visibility: visible;
			opacity: 1;
		}

		.w-picker-cnt {
			position: fixed;
			bottom: 0;
			left: 0;
			width: 100%;
			transition: all 0.3s ease;
			transform: translateY(100%);
			z-index: 3000;
			background-color: #fff;
		}

		.w-picker-cnt.visible {
			transform: translateY(0);
		}

		.w-picker-header {
			display: flex;
			align-items: center;
			padding: 0 30upx;
			height: 88upx;
			background-color: #fff;
			position: relative;
			text-align: center;
			font-size: 32upx;
			justify-content: space-between;
			border-bottom: solid 1px #eee;

			.w-picker-btn {
				font-size: 30upx;
			}
		}

		.w-picker-hd:after {
			content: ' ';
			position: absolute;
			left: 0;
			bottom: 0;
			right: 0;
			height: 1px;
			border-bottom: 1px solid #e5e5e5;
			color: #e5e5e5;
			transform-origin: 0 100%;
			transform: scaleY(0.5);
		}
	}
</style>